1. Department of Cardiology, Azienda Ospedaliera Universitaria Integrata Verona, Verona, Italy
2. Deparment of Cardiology, Istituto Clinico Sant’Ambrogio, Milan, Italy
3. Deparment of Cardiology, Azienda Sanitaria Locale di Asti, Asti, Italy
4. Department of Thoracic Surgery, Azienda Ospedaliera Universitaria Integrata Verona, Verona, Italy